Art of coating material



Sept. 3, 1935. c. D. KNowLToN ART OF COATING MATERIAL original Filed sept. s, 195o 2 Sheets-Sheet 1 I m. Mmmu. JUL QMQN %N\mmx.\ m 11i 111 v Av nu Av Av E 0 n o oO oOo Q .cov 0 a 0 9 ooo omo 1 Fe f.. ,f......f A O w ,Q www @mw .Qb Anw o mwxu o Mmm mm1 o O O @V n C .RRQ o.. Nm.. o QN. 0.. www. Ah. www. y v o o MRW. MMM www.. www. www.

Sept. 3, 1935. c. D. KNowLToN ART OF COATING MATERIAL originali Filed sept. a, 1930 Patented Sept. 3, 1935 PATENT OFFICE 2,013,056 ART or coA'rrNG MATERIAL Cutler D. Knowlton,l Beverly, Mass., assignor to lloague-Sprague Corporation, Lynn, Mass., a corporation of Massachusetts Original application September 8, 1930, Serial No. 480,518. Divided and this application April 21, 1932, Serial No. 606,605

13 Claims.

Thisl invention relates to the coating of material, it especially concerning the application of adhesives to such articles as the blanks which are to be set up to form boxes. In this connection,

l the present invention is described in an applica- The above-identified parent application is fork an apparatus in which webs of box-material, as shell, stay, liner and cover, are advanced continuously to have performed upon them during their travel a plurality of forming operations which convert them intov box-blanks. To eiect a union of the webs, each of them, other than the shellweb, is coated with glue or other adhesive be- Iore they are subjected to a pressing operation. This invention has as an object the provision of a convenient coating mechanism, so organized that its elements may readily be adjusted to control the quantity of the coating substance applied and be separated for cleaning, and the so arranging this or a similar coating mechanism or mechanisms that injury to the Webs will be prevented if the apparatus, and consequently the advance of said'webs, stops.

A feature of the invention by which this object is achieved may be found in a coating mechanism in which a receptacle for a coating substance has a coating-supplying roll rotatable therein, with which supplying roll cooperates a coating-applying roll, one of" these rolls having movable bearings. With one of these bearings i contacts an expansible member, as a sectional rod, with a spring interposed between the sections, and there is means, herein shown as "a rotatable cam, arranged to vary the position of the member. This will cause the bearing of the roll to be held yieldably against an adjustable member in all positions of the latter, such adjustment governing the quantity of the adhesive delivered to the applying roll, or will serve to separate the rolls and allow access to them for cleaning and the like.

As a further feature of the invention, I combine in a blank-making apparatus, including operating mechanism and means for advancing web-material thereto, a coating mechanism having an applying member, whichv may be a rotatable roll, in contact with which the web travels to the operating mechanism, and a rod or other member contacting with the web and being mov- (Cl. lll-#50) able to separate it from the applying member. When the web is thus acted upon, if its advance ceases, injury to it by its adhesion to the applying member is prevented. I prefer to utilize -the normal tension of the web to maintain the separating member ineiective, connections to the member acting to remove the web from the roll or other applying means when said web stops. If plural coating mechanisms are to be associated with plural operating mechanisms, each of said coating mechanisms having a coating-applying member which engages a web, I prefer to furnish means arranged to simultaneously separate the members and webs, as by connections between the separating vmembers of the respective coating mechanisms arranged to move them simultaneously in one direction only. The operator may thus, by a single controlling movement, guard against the sticking of the webs to the applying; members throughout the entire apparatus.

In the accompanying drawings,

Fig. 1 shows in side elevation a portion of a blank-making apparatus of the previously mentioned application, in which the present invention is embodied in one form;

Fig. 2 is a broken side elevation of my improved coating mechanism; and

Fig. 3 is a partial perspective View thereof.

The drawings illustrateY three gluing mechanisms H, J and P, which, respectively, coat lining-material c, stay-material e and cover-material d, all of these being in web-form and drawn from coils by mechanisms which operate upon them. In Fig. l, a series of these operating mechanisms appears supported upon a frame 52. But two of these will, however, be particularly re- -ferred to. An assembling mechanism I presses the coated lining-web c and the coated stay-webs e into adhesive contact with the shell-web b, while an assembling mechanism Q similarly acts upon the cover-Web d. The sources of the various webs, save that of the stay-material e, are not shown. The essential characteristics of all the gluing mechanisms are the same. Only the mechanism H, indicated partially in Fig. 1 and fully in Figs. 2 and 3, will be described in detail.

A glue-receptacle 290 rests upon a'platform 292 arranged to be lowered and raised by the operator, for cleaning and lling the receptacle, by pivoted arms 294, 294 connected to the platform to give a parallel motion. This platform is actuated by a hand-lever 296 attached to a spindle, to which one pair of arms is connected. It may be latched in a raised position by engagement with the hand-lever of a sleeve 291 sliding f in the frame.

upon the pivot-spindle of one of the pairs of arms 294 and movable into and out of the path of the lever. Pivoted in the frame and at opposite sides of the receptacle by a; transverse spindle 299, to which they are secured, are arms 293, these arms furnishing at their lower extremities bearings upon which rotates a supply-roll 300 dipping in the glue in the receptacle. sive from the supply-roll and delivering, in turn, to the web of lining-material c traveling in contact with it, is an applying roll 302 journaled in the frame. 'Ihe roll 302 is driven by sprocket'- gearing 93 from one ofthe operating mechanisms, it, in turn, rotating the roll 300, which is of greater diameter, through spur-gearing 304. Said roll 300 has imparted to it a considerably less peripheral speed than its companion, so it will not deliver an excessive quantity of glue.` The spacing between theA rolls, and, therefore,

the amount of glue delivered to the applying roll,

may be altered by adjustable stop-screws 306, against which the bearing arms 298 are forced yieldably by expansible rods 308 arranged to slide Each rod is in sections, with an associated spring 3| 0 which urges one section of the rod against the corresponding arm. 'I'he other rod-section presses against a cam 3I2 rotatable upon the frame by a hand-lever 3M,

thereby to control the condition of the expansible member or rod. As illustrated, a high or projecting portion of the camlholds the rod in so its spring is effective to maintain the roll 300 forward in its glue-supplying relation, pressed yieldablytoward the roll 302 for al1 adjustments of the screws 306. This arrangement also allows a separation of the rolls if a foreign substance is carried between them. When the cam is rotated by the lever to bring a depression 3I6 opposite the rod, the roll 300 is free to fall away from the companion roll, pushing the rod before it. This release is utilized to facilitate the cleaning of the rolls when the receptacle 290 has been removed. I'he latter operation is effected by moving the sleeve 291 to one side, permitting the support 292 to descend. Y

Were the apparatus stopped and the web c brought to rest in contact with the applying roll 302, said web would be injured as a result of sticking to the roll. To prevent this, I associate with the applying roll a device for separating the material from it. Herein, thisldevice consists of a stripper-rod 320 parallel to the axis of the applying roll and extending beneath the web, the uncoated side of which runs in contact with it. The rod is carried by a pair of arms 322 fixed to a transverse spindle 323 rotatable in the frame. Also secured to this spindle are a crank arm 324, having a crank handle 325, and a duplicate crank arm 324e on the far side of the machine, as observed in Fig. 3, which provide for turning the spindle and, hence, for the consequent lifting of the web clear of the roll. Normally, the tension of the traveling material maintains the stripperrod 323 depressed and ineffective. But, after the operator has lowered the crank and thus lifted the rod, the web being now stationary, the' weight of the crank and the resistance of the spindle to rotation is sufficient to continue to hold the web out of contact with the applying roll after the crank has been released. 'Ihe web being again started, its pull returns the rod to normal, the, web now engaging the applying roll. To guide the lweb into and out of the gluing mechanism and obtain the necessary arc of contact with the periphery of the applying roll, the structure may Receiving the adhebe simpliiied by utilizing the spindles which serve Jother purposes, surrounding them, if desired. with rolls 320- to reduce the friction of the web. Such guiding means is illustrated as furnished by the spindles of the arms 294, 293 and 322.

Between the gluing mechanism H for the liningmaterial c, Just described, and the mechanisms J and P, which respectively coat the stay-material e and the cover-material d, there are but minor differences. In the mechanisms J and P, the expansible actuating means for the supply-rolls are operated by bell-crank-levers 321, instead of by cams. Their lever-arms 320, for operating the stripper-rolls 320 to remove the webs from engagement with the applying rolls, extend upwardly and have, turning freely upon their fulcra, arms 331 which are joined/by a connecting-rod 323, a

' rod 33| also joining a portion 331a of the arm 331 of the mechanism J to an arm 335 constituting an operating member which is rotatable about the spindle 323 of crank-arms 324 and 324| at the mechanism H. When these intermediate connections 329 and 33| are employed, they are preferably arranged as one-way connections so that a single act on the part of the operator will cause the webs at all three gluing mechanisms to be removed simultaneously from contact with their glue-applying rolls, or that any one of said mechanisiris may be independently controlled. To this end, each of the arms 324a and 328 has a lateral projection 333, with which contacts the arm 335 at the mechanism H or one of the arms 331 at the mechanisms J and P. By moving the rod 329 to the left (Fig. 1) or the rod 33| down, the operator may, even if not stationed at the gluing mechanisms, carry the operating members 335 and 331 against the projections 333 positively to actuate all the. stripper-rods. the removal of the material from but one of the applying rolls 302 is desired, this may be accomplished by movementl of the chosen arm 324 or 320, the projection 333 thereon traveling away from the associated arm. `and leaving the stripper-rods of the other mechanism unaffected.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A coating mechanism comprising a receptacle for a coating substance, a coating-supplying roll rotatable therein, an applying roll receiving coating substance from the supplying roll, movable bearings for ore of the rolls, a multi-part expansible member spring expanded to contact with a bearing and operating by its expansion to urge said rolls toward one another, and means arranged to vary the condition of said member to control the relation of said rolls.

2.-A coating mechanism comprising a receptacle for a coating substance, a coating-supplying roll rotatable therein, an applying roll cooperatingl with the supplying roll' and receiving coating substance therefrom, movable bearings i tween the rod-sections, an actuating member contacting with the rod at the end opposite the bearing, and a screw with which' the roll-bearing contacts at the side opposite the sectional rod.

5. A coating mechanism comprising a receptacle for a coating substance, a coating-supplying roll rotatable therein, an applying roll co-operating with the supplying roll, movable bearings for p one oi the rolls, a sectional rod contacting at one extremity with a bearing, a spring interposed between the rod-sections, and a rotatable cam contacting with the rod at the end opposite the bearing.

6. A web-coating mechanism comprising a frame, an adhesive-receptacle supported thereon, an adhesive-applying roll rotatable in the frame, means for guiding the web about the periphery of the applying roll, arms pivoted upon the frame, an adhesive-supplying roll rotatable upon the arms and dipping in the receptacle and delivering to the applying roll, and an expansion spring actving upon each arm to turn said arm about its pivot and force the supplying-roll toward the applying roll.

-'I. A web-coating mechanism comprising a Irame, an adhesive-receptacle supported therepn, an adhesive-applying roll rotatable in the frame, means for guiding the web about the periphery oi the applying roll, arms pivoted upon the frame, an adhesive-supplying roll rotatable upon the arms and dipping inthe receptacle and delivering to the applying roll, a support for the adhesive-receptacle movable toward and from the supplying roll, the supplying roll being movable into the space left by the withdrawal of the receptacle, and means for forcing the supplying roll toward the applying roll and for releasing said supplying roll after the receptacle has been withdrawn.

8. In a blank-making apparatus, operating mechanism, means for advancing web-material to the operating mechanism,` coating mechanism having a rotatable applying roll in contact with which the web travels to the operating mechanism, and a separating member contacting yieldablywith the web and movable to separate the web from the applying roll, the web in its ad- Vance maintaining the separating member normally ineiective.

' 9. In a blank-making apparatus, operating mechanism, means for drawing Web-material through the operating mechanism, gluing mechanismhaving a rotatable applying roll in contact with which the web travels to the operating mechanism, a rod contacting with the under side of the web adjacent to the applying roll pivotally supported and yieldably retained in opera.- tive position, said rod being normally depressed by the tension of the web, andan operating member having a one-way connection to the rod constructed and arranged to elevate it and separate the web from the roll, while permitting operation of the rod without disturbing the operating member.

10. In a blank-making apparatus of the type in which webs of material are advanced from a plurality of supplying rolls into engagement with the applying rolls of a plurality of coating mechanisms and thence to operating mechanisms wherein the webs are combined to make blanks, the combination of movable members arranged to separate the applying rolls and the webs, operator-controlled members for moving said separating members, and a common operating device having a lost-motion connection to said operatorcontrolled members.

11. In a blank-making apparatus of the type in which webs of material are advanced from a plurality of supplying rolls into engagement with the applying rolls of a plurality of coating mechanisms and thence to operating mechanisms wherein the webs are combined to make blanks, the combination of members one contacting with each web and being movable to separate said web from the corresponding applying roll, andconnections between the members arranged to move them simultaneously in one direction only.

l2. In a blank-making apparatus of the type in which webs of material are advanced from a plurality of supplying rolls into engagement with the applying rolls of a plurality of coating mechanisms and thence to operating mechanisms wherein the Webs are combined to make blanks, the combination of members one contacting with each web and being movable to separate said web from the corresponding applying roll, and connections between the members to move them simultaneously to operative position, such connections being arranged to permit independent movement of the members to inoperative position.

13. In a blank-making apparatus of the type in which webs of material are advanced from al plurality of supplyingl rolls into engagement with the applying rolls of a plurality o f coating mechanisms and thence to operating mechanisms wherein the webs are combined to make blanks, the combination of rods each contacting with a web adjacent to the applying roll of each coating mechanism, levers upon which the rods are mounted, each lever being provided with a projection, arms pivoted adjacent to each lever and contacting with only one side of its projection, and connections between the arms.

1 Y CUTLER D. KNOWLTON. 

